Finding the Fourth Proportional to 687,817.92, 1,031,572.44 and 288,909.12
Calculator
Solution
The fourth proportional to 687,817.92, 1,031,572.44 and 288,909.12 is: 433,298.81
Step by Step Solution
- Step 1: Write the proportion equation
687,817.92 : 1,031,572.44 = 288,909.12 : x - Step 2: Convert to fraction form
687,817.92/1,031,572.44 = 288,909.12/x - Step 3: Cross multiply
687,817.92x = 1,031,572.44 × 288,909.12 - Step 4: Simplify right side
687,817.92x = 298,030,685,856.65 - Step 5: Solve for x
x = 298,030,685,856.65/687,817.92 - Step 6: Final answer
x = 433,298.81
Related Problems
Find fourth proportional to 343,908.96, 515,786.22 and 144,454.56
Half scale
Find fourth proportional to 1,375,635.84, 2,063,144.88 and 577,818.24
Double scale
Find fourth proportional to 687,818.92, 1,031,573.94 and 288,910.12
Similar ratio
Find fourth proportional to 1,031,726.88, 1,547,358.66 and 433,363.68
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.